# Not Able To Flatten nested List

**URL:** <https://forum.ansible.com/t/not-able-to-flatten-nested-list/38508>\
**Category:** Ansible Project\
**Created:** [October 10, 2023, 12:25pm UTC](https://forum.ansible.com/t/not-able-to-flatten-nested-list/38508 "2023-10-10T12:25:10Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![javed\_khan\_siddque](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/javed_khan_siddque/32/4964_2.png) [@javed\_khan\_siddque](https://forum.ansible.com/u/javed_khan_siddque)\
**Post date:** [October 10, 2023, 12:25pm UTC](https://forum.ansible.com/t/not-able-to-flatten-nested-list/38508/1 "2023-10-10T12:25:10Z")

</div>

I have one of the below list of dict.

storage\_details\_combined: [  
{  
“wwns\_dict”: {  
“host4”: “0x100098f2b3a1f324”,  
“host5”: “0x100098f2b3a12635”  
},  
“wwns\_pmax\_list”: [  
“100098f2b3a12635”,  
“100098f2b3a1f324”  
],  
“server\_name”: “[myserver3.domain.org](http://myserver3.domain.org)”  
},  
{  
“wwns\_dict”: {  
“host3”: “0x100098f2b3a14633”,  
“host1”: “0x100098f2b3a1d541”  
},  
“wwns\_pmax\_list”: [  
“100098f2b3a1d541”,  
“100098f2b3a14633”  
],  
“server\_name”: “[myserver11.domain.org](http://myserver11.domain.org)”  
}  
]

I am expecting a dict like below.

my\_dict:  
{  
100098f2b3a1f324 : myserver3\_host4  
100098f2b3a12635 : myserver3\_host5  
100098f2b3a14633 : myserver11\_host3  
100098f2b3a1d541 : myserver11\_host1  
}

 ![MicrosoftTeams-image.png](https://us1.discourse-cdn.com/ansible/original/2X/3/39027d21a693e3ab90175ac7db4d5e4124c59f65.png)

---

<div class="post-metadata">

**Author:** ![vbotka](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/vbotka/32/359_2.png) [@vbotka](https://forum.ansible.com/u/vbotka)\
**Post date:** [October 10, 2023, 12:41pm UTC](https://forum.ansible.com/t/not-able-to-flatten-nested-list/38508/2 "2023-10-10T12:41:45Z")

</div>

> my\_dict:  
> {  
> 100098f2b3a1f324 : myserver3\_host4  
> 100098f2b3a12635 : myserver3\_host5  
> 100098f2b3a14633 : myserver11\_host3  
> 100098f2b3a1d541 : myserver11\_host1  
> }

&nbsp;&nbsp;&nbsp;&nbsp;storage\_details\_combined:  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- server\_name: myserver3.domain.org  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wwns\_dict:  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;host4: '0x100098f2b3a1f324'  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;host5: '0x100098f2b3a12635'  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wwns\_pmax\_list:  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- 100098f2b3a12635  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- 100098f2b3a1f324  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- server\_name: myserver11.domain.org  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wwns\_dict:  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;host1: '0x100098f2b3a1d541'  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;host3: '0x100098f2b3a14633'  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wwns\_pmax\_list:  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- 100098f2b3a1d541  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- 100098f2b3a14633

Use Jinja

&nbsp;&nbsp;&nbsp;&nbsp;my\_dict: |  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% filter from\_yaml %}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% for i in storage\_details\_combined %}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% set srv=i.server\_name|split('.')|first %}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% for k,v in i.wwns\_dict.items() %}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{{ v[2:] }}: {{ srv }}\_{{ k }}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% endfor %}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% endfor %}  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{% endfilter %}

---

<div class="post-metadata">

**Author:** ![javed\_khan\_siddque](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/javed_khan_siddque/32/4964_2.png) [@javed\_khan\_siddque](https://forum.ansible.com/u/javed_khan_siddque)\
**Post date:** [October 10, 2023, 1:05pm UTC](https://forum.ansible.com/t/not-able-to-flatten-nested-list/38508/3 "2023-10-10T13:05:57Z")

</div>

Hi @Vladimir,

Thanks !  
It worked.